(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Children's Library | Biodiversity Heritage Library | Additional Collections
Search: Advanced Search
Anonymous User (login or join us)
Upload
See other formats

Full text of "The manufacture and properties of iron and steel"

THE OPEN-HEARTH FURNACE.                             155
Heat generated in producer, calories....................   455,760
Heat taken out of producer in gas and steam............   201,750
Surplus left in producer, calories....................   254,010
Absorbed in decomposing steam (rendered latent)...   182,700
Loss by radiation and conduction, calories..........    71,310
Summary of above results on Producer Practice, per 200 kg. coal.
Calories.
Lost as carbon in ash...................................     30,700
Lost by radiation and conduction.......................    71^310
Sensible heat of hot gas and steam......................   201,750
Total heat loss of producer.........................   303,760
Calorific power of producer gas.........................1,101,240
Total heat value of coal.............................1,405,000
Per cent, lost in producer...............................           21.6
Losses in the Producer in Percentage of the Heat Value of the Coal.
Per cent, of        Per cent, of
value of        total producer
Calories.          coal.                  loss.
Lost as C in ash............... 30,700            2.1                    10.1
Radiation and conduction.-..... 71,310            5.1                    23.5
Sensible heat of steam........    9,280            0.7 )14,            3.1 )fifi4
Sensible heat of dry gas.......192,470          13.7 J A*'*          63.3 J
303,760          21.6             .     100.0
TABLE VIII-B.
Distribution of Heat in the Furnace.
C in gas per kg. of coal, kg.............................          0.7378
C in gas per 200 kg. coal, kg.............................       147.56
C in 1 c. m. (dry) chimney gas, kg. (0.127x0.54)........          0.06858
Volume (dry) chimney gas per 200 kg. coal, c. m........      2152
Free oxygen present in this gas (2152x0.067), c. m......       144
Excess air corresponding to free oxygen, c. m....------...       699
C02 in chimney gas (2152x0.127), c. m...................       273
N in chimney gas (2152x0.806), c. m....................      1735
N in excess air used, c. m...............................       536
N in theoretical products of combustion, c. m...........      1199
N in producer gas per 200 kg. coal (874x0.582), c. m....       509
N in air necessary for theoretical combustion, c. m......       690
Air necessary for theoretical combustion, c. m............       872
Excess of air used, percentage 680-4-872..................         78
HsO in chimney gas (2152x0.078), c. m..................       168
Heat in air used, at 280, Sm (0 to 280)=0.314
Theoretical air needed (872x0.314x280), calories.........     76,650
Excess air used (680x0.314x280), calories.................     59,770
Total, calories ......................................   136,420